Improve login page

authentication/templates/authentication/auth_form.html

@@ -11,7 +11,7 @@
             {% endif %}
             {% csrf_token %}
             {{ form|crispy }}
-            <button type="submit" class="btn btn-primary">{{ action }}</button>
+            <button type="submit" class="btn btn-primary btn-block">{{ action }}</button>
         </form>
     </div>
 {% endblock %}